test/SILOptimizer/dynamic_self_cast.sil

// RUN: %target-sil-opt -enable-sil-verify-all -O %s | %FileCheck %s

sil_stage raw

import Swift

public class SelfCasts {
}

// CHECK-LABEL: sil @$dynamic_self_cast_1 : $@convention(method) (@guaranteed SelfCasts, @thick SelfCasts.Type) -> @owned Optional<SelfCasts>
sil @$dynamic_self_cast_1 : $@convention(method) (@guaranteed SelfCasts, @thick SelfCasts.Type) -> @owned Optional<SelfCasts> {
bb0(%0 : $SelfCasts, %1 : $@thick SelfCasts.Type):
  strong_retain %0 : $SelfCasts
  // CHECK: checked_cast_br
  checked_cast_br %0 : $SelfCasts to @dynamic_self SelfCasts, bb1, bb2
bb1(%7 : $SelfCasts):
  %8 = enum $Optional<SelfCasts>, #Optional.some!enumelt, %7 : $SelfCasts
  br bb3(%8 : $Optional<SelfCasts>)

bb2:
  strong_release %0 : $SelfCasts
  %11 = enum $Optional<SelfCasts>, #Optional.none!enumelt
  br bb3(%11 : $Optional<SelfCasts>)

bb3(%13 : $Optional<SelfCasts>):
  return %13 : $Optional<SelfCasts>
}

// CHECK-LABEL: sil @$dynamic_self_cast_2 : $@convention(method) (@guaranteed SelfCasts, @thick SelfCasts.Type) -> @owned Optional<SelfCasts>
sil @$dynamic_self_cast_2 : $@convention(method) (@guaranteed SelfCasts, @thick SelfCasts.Type) -> @owned Optional<SelfCasts> {
bb0(%0 : $SelfCasts, %1 : $@thick SelfCasts.Type):
  strong_retain %0 : $SelfCasts
  // CHECK-NOT: checked_cast_br
  checked_cast_br %0 : $SelfCasts to SelfCasts, bb1, bb2
bb1(%7 : $SelfCasts):
  %8 = enum $Optional<SelfCasts>, #Optional.some!enumelt, %7 : $SelfCasts
  br bb3(%8 : $Optional<SelfCasts>)

bb2:
  strong_release %0 : $SelfCasts
  %11 = enum $Optional<SelfCasts>, #Optional.none!enumelt
  br bb3(%11 : $Optional<SelfCasts>)

bb3(%13 : $Optional<SelfCasts>):
  return %13 : $Optional<SelfCasts>
}